Brake questions

[bhemingson]

I moved my truck (1972 GMC 2500) yesterday into my new shop space. Truck had been stored a couple of months while I got things sorted out. The brake light came on and the front master cylinder reservoir was dry. I added fluid and got a little brake. I had about a 10 mile drive to the new shop so took back roads and stopped to top off once.

Questions: 1) I can't spot leaks anywhere, could the fluid be going into the booster? 2) I obviously need a master cylinder should I replace the booster too given the trucks age? 3) Who supplies good OEM replacements?I see a lot of "universal" boosters and I just want a GMC one. 4) I noticed a different fluid - water? - beaded up on the top of the brake fluid where would that come from?

[kehstr]

1) the fluid could go into the booster, but usually, it's the rear reservoir that leaks into the booster, if only one does it, at least as far as I have seen.
2) if the booster works good, I wouldn't worry about changing it, a new booster may make the brakes work worse
4) It could be water, but hard to say without seeing it.